My early days were a massive improvement for me, but I went from having highs of 20+ every single day to being in single digits. The algorithm is forever learning about you. I've been on Medtronic 780g/Guardian 4 for almost 4 years now, and I still have to change some settings here and there even now. I've recently changed my carb ratio (again). I think you've just got to remember that although insulin pumps/cgms do make controlling things easier you're still going to have to play around with the settings from time to time, especially as your daughter ages as well, I can only assume she's still young ish so in the years to come a lot of changes will probably take place.
Also her levels being slightly higher at 8.5 (previously 7) isn't a major issue in my opinion, I know some people do like them on the lower end but the general rule of thumb as my doctor always tells me is if you're blood sugars are between the standard of 3.9-10 for 70% of the time they're happy. My hba1c floats around 48 I haven't seen it go above 48 since I started on closed loop and I'm for the most part in the 3.9-10 range for 70% of the time.